EP1896842A1 - Nichtdestruktives testen von rohren - Google Patents

Nichtdestruktives testen von rohren

Info

Publication number
EP1896842A1
EP1896842A1 EP06761063A EP06761063A EP1896842A1 EP 1896842 A1 EP1896842 A1 EP 1896842A1 EP 06761063 A EP06761063 A EP 06761063A EP 06761063 A EP06761063 A EP 06761063A EP 1896842 A1 EP1896842 A1 EP 1896842A1
Authority
EP
European Patent Office
Prior art keywords
pipe
acoustic
wall thickness
fluid
velocity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06761063A
Other languages
English (en)
French (fr)
Other versions
EP1896842A4 (de
EP1896842B1 (de
Inventor
Osama Hunaidi
Marc Bracken
Alex Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mueller International LLC
Original Assignee
National Research Council of Canada
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37570059&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1896842(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by National Research Council of Canada filed Critical National Research Council of Canada
Publication of EP1896842A1 publication Critical patent/EP1896842A1/de
Publication of EP1896842A4 publication Critical patent/EP1896842A4/de
Application granted granted Critical
Publication of EP1896842B1 publication Critical patent/EP1896842B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
    • G01M3/243—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations for pipes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/222—Constructional or flow details for analysing fluids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/4409—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
    • G01N29/4418—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison with a model, e.g. best-fit, regression analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/01—Indexing codes associated with the measuring variable
    • G01N2291/011—Velocity or travel time
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02827—Elastic parameters, strength or force
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02854—Length, thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/263—Surfaces
    • G01N2291/2634—Surfaces cylindrical from outside

Definitions

  • This invention relates to the non-destructive condition assessment of pipes, and in particular buried pipes or pipes that are otherwise inaccessible, such as fire sprinkler systems and pipelines in the oil and gas industry.
  • Buried pipes such as pipes used in municipal water systems, lose metal resulting in a reduction in pipe wall thickness, as a result of internal and external corrosion. Sustained wall thickness loss eventually causes the pipe to fail.
  • Such pipes have to be periodically inspected and evaluated for structural adequacy. Accurate information about pipe wall thickness is needed to determine the structural capacity of pipes. Also, monitoring of pipe metal loss is needed to estimate the remaining service life of pipes, which is an important part of maintenance management systems of large pipe networks (e.g., urban water or gas distribution systems). It is therefore desirable to be able to assess the condition of buried pipes in a non-destructive and non-intrusive way, that is without damaging the pipe and without taking it out of service.
  • One way of determining pipe wall thickness is to obtain pipe coupons (or samples) and then measure the thickness off-site using thickness callipers. Also, wall thickness can be measured using an ultrasonic gauge at locations where the pipe is naturally exposed or intentionally excavated. Both methods provide only a discrete measurement of wall thickness.
  • An alternative method for obtaining a continuous measurement of pipe wall thickness employs ultrasonic or magnetic flux leakage or remote-field eddy current devises which are launched inside pipes using robots (known as pipeline pigs).
  • the pipe wall thickness is determined from the average propagation velocity of low-frequency acoustic disturbances in the pipe (e.g., pressure fluctuations).
  • Low-frequencies typically have a value of less than about 1000Hz.
  • the propagation velocity depends on the internal diameter and circumferential thickness profile of the pipe, density and bulk modulus of elasticity of the fluid, and Young's modulus of elasticity and Poisson's ratio of the pipe wall material.
  • the velocity can be calculated using the equations derived theoretically.
  • the pipe wall thickness is back calculated from these equations using the measured value of the propagation velocity and the above pipe and fluid parameters, which are usually known or easily found.
  • the acoustic disturbance can propagate in the in-bracket mode, where the source of the disturbance lies between the two points and the disturbance propagates in opposite directions from the source to the separated points, or in the out-of-bracket mode, where the acoustic source lies outside the two points, and the disturbance propagates from the source and sequentially past the two points in the same direction.
  • the propagation velocity can be determined on-site non-destructively and non-intrusively by measuring the time delay between acoustic signals measured at two points on the pipe that are a known distance apart (e.g., control valves or fire hydrants). Ambient noise in the pipe can be used as the acoustic source.
  • acoustic noise created by releasing pressurized fluid or by a specially designed device at an in-bracket or out-of-bracket point e.g., a fire hydrant in the case of water distribution pipes
  • Acoustic signals can be measured using a pair of vibration sensors (e.g., accelerometers) or hydrophones.
  • the time delay between the two measured signals is determined using the well-known time-of- flight method or the cross-correlation function (traditional or enhanced) calculated in the time or frequency domains as described in U.S. patent 6,453,247, the contents of which are herein incorporated by reference.
  • the average propagation velocity in the pipe can then be calculated by dividing the difference between the distances of the sensors from the acoustic source by the time delay.
  • the acoustic damping capacity of the pipe material can also be determined based on the attenuation of the acoustic signals described above.
  • the damping capacity can be determined based on the width of the frequency spectrum peak that corresponds to the fundamental ring frequency of the pipe or based the logarithmic decrement of transient ring vibration.
  • the frequency spectrum and logarithmic decrement can found using a simple mechanical impact test at a location where the pipe is exposed, e.g., in an access manhole.
  • the damping capacity of the pipe material can be used to obtain information about its tensile strength, especially for cast iron pipes, based on published relationships.
  • the method in accordance with the invention has the advantage of being nondestructive and non-intrusive. All required measurements can be made from the ground surface.
  • the length of the pipe section represented by the average profile can be arbitrarily chosen. Initially, a 100 metres long section, which is the usual distance between fire hydrants in urban areas, can be chosen. Subsequently, if higher resolution is needed, small access holes to the pipe may be drilled, e.g., using keyhole vacuum excavation technologies, to measure the thickness over shorter pipes sections. Alternatively, arrays of closely spaced hydrophones may be inserted into pipes thru fire hudrants or corporation stops. The measurement and calculation of the pipe wall thickness can be easily made using Windows- based PC software. The proposed method is easy to implement (e.g., in conjunction with routine leak detection surveys). Also, it does not require a high level of operator skill.
  • Figure Ia shows an arrangement for measuring propagation velocity of buried pipes in accordance with a first embodiment
  • Figure Ib shows an arrangement for measuring propagation velocity of buried pipes in accordance with a second embodiment
  • Figures 2a and 2b show PC screens displaying the results of a wall thickness measurement in accordance with an embodiment of the invention
  • Figure 3 shows the variation of predicted pipe thickness as a function of bulk modulus of water
  • Figure 4 shows the frequency spectrum of impact-echo tests on ductile iron sample of reference pipe; and [0018] Figure 5 shows the predicted wall thickness of reference pipe using adjusted bulk modulus of elasticity of water of 1.95 GPa at 20.8 0 C.
  • V 0 ⁇ yKIp (1)
  • K is the bulk modulus of elasticity of the fluid, pis its density, and ⁇ is the ratio of the specific heats of the fluid (i.e., the ratio of the fluid's heat capacity in a constant pressure process to the heat capacity in a constant volume process).
  • the elasticity of the wall of a pressurized fluid-carrying pipe reduces the velocity of acoustic waves in the fluid.
  • the amount of the reduction of the velocity depends on the size and shape of the cross-sectional area of the pipe and the elastic modulus of the material of the pipe.
  • the general equation of the velocity of acoustic waves in the fluid is defined by the following equation:
  • the acoustic velocity may be approximated as:
  • ⁇ c and ⁇ a are circumferential and axial stresses in the pipe wall, respectively, and E and ⁇ is the elastic modulus and Poisson's ratio of the pipe material.
  • ⁇ is the frequency of the propagating pressure wave (in radians per second)
  • the maximum frequency of acoustic noise signals is typically 800 Hz.
  • the minimum thickness of the pipe, t m ⁇ n can be back calculated using Eqs. (18) or (23) for pipes with linearly varying wall thickness.
  • the maximum thickness, t max is assumed to be equal to the original thickness of the pipe wall, which is usually known or can be measured using a single pipe sample. This is justified based on the observation that a certain part of the pipe's cross-section normally retains its original thickness. This part corresponds to the cathode of the corrosion cell created by differential aeration of the pipe's surface.
  • the minimum thickness can also be calculated using Eq. (16) from the mean thickness back calculated using Eq. (20) or (26) for pipes having uniform wall thickness. This will lead to less accurate results than would be obtained using Eq.
  • the velocity of acoustic waves in the pipe, v can be measured by correlating acoustic noise signals, which can be ambient or created by intentionally by an acoustic source at a known location.
  • the internal diameter of the pipe, D, bulk modulus of elasticity of the fluid, K, and its density, p, elastic modulus of the pipe material, E, and its Poisson's ratio, ⁇ are usually known or can be easily found.
  • V 0 1.402385 x 10 3 + 5.038813 f 5.799136 x 10 "2 T 2 +3.287156 x 10 "4 T 3 (28)
  • T is the water temperature in 0 C.
  • This expression is based on Marczak, W. (1997), Water as a standard in the measurement of the speed of sound in liquids. Journal of the Acoustical Society of America, Vol. 102, No. 5, pp. 2776-2779, the contents of which are incorporated herein by reference.
  • Table 1 lists the velocity of sound, density and the corresponding bulk modulus of elasticity for temperatures between 0 and 40 0 C. Density values are based on the Handbook of Chemistry and Physics, CRC Press, 85 th edition, 2004-2005, the contents of which are incorporated herein by reference. Bulk modulus values were obtained by using Eq. 2.
  • VoI 69, No 3, pp 696-701 that a system that exhibits attenuation, which is the case for water, must exhibit dispersion, i.e., dependence of phase velocity on frequency. Also, they showed that acoustic velocities at low frequencies are typically lower than those at higher ones. Consequently, the bulk moduli of water in distribution pipes may be lower than those listed in Table 1.
  • the uncertainty regarding the appropriate value of the bulk modulus to be used for thickness calculations can be minimized in accordance with an embodiment of the invention by careful measurement.
  • the acoustic velocity is measured for a "reference" pipe of a known wall thickness, diameter and Young's modulus.
  • a recently installed pipe of a known class should be used and its Young's modulus should be measured dynamically for an exhumed or leftover sample.
  • the bulk modulus is back calculated from the appropriate theoretical acoustic velocity equation or a numerical model for water-filled pipes together with other already known or measured pipe parameters. Measurement of the acoustic velocity of the reference pipe and other pipes should be performed within few days of each other. This is to ensure that temperatures of the fluids in the pipes are similar.
  • the bulk modulus may be determined from a relationship established from a set of measurements of the fluid's bulk modulus and temperature for the reference pipe at different times of the year. Determination of the bulk modulus as described here amounts to calibrating the whole thickness measurement method.
  • the back calculated modulus implicitly includes corrections for approximations made in the derivation of the velocity equation, e.g., neglecting small terms and inertial effects.
  • the acoustic wave velocity can be determined by the following equation, given in Fluid Transients in Pipes and Tunnels: Speed of Propagation of Pressure Waves.
  • the thicknesses of the metal section and cement lining for 152 mm 0 Class 52 ductile iron pipes are 7.9 and 2 mm, respectively.
  • the thickness of an "equivalent' * ductile iron pipe with no cement lining is equal to 8.2 mm, as found from Eq. 29.
  • the equivalent pipe has the same acoustic wave velocity as the cement-lined one.
  • Young's modulus of ductile iron is equal to 169 GPa, as found from the resonance frequency of a rod sample using an impact-echo test that can be seen in Figure 4; Poisson's ratio was taken equal to 0.3; and Young's modulus of the cement lining was taken equal to 24 GPa.
  • the impact- echo test and modulus calculation was performed in accordance with ASTM standard E 1876-01: Standard test method for dynamic Young's modulus, shear modulus, and Poisson's ratio by impulse excitation of vibration, 2001.
  • a system of linear equations can be formed based on the relationship between time delays of acoustic signals induced by acoustic sources at different locations, acoustic propagation velocity in the pipe, and lengths of connecting pipes. Time delays between measured acoustic noise can be determined using the time-flight method or the cross- correlation function (either traditional or enhanced). The acoustic velocity can then be found by solving the system of linear equations.
  • the number of acoustic sources at different locations should be equal to the number of unknowns. Two or three acoustic sources are sufficient in most cases.
  • This non-destructive technology in accordance with embodiments of the present invention to measure pipe metal loss, i.e., to determine the remaining thickness of pipe walls, provides these utilities with a reliable and accurate way to obtain data that allows them to calculate the remaining service life of pipes. This allows the formulation of capital budget plans that are based on technically sound engineering data, which in turn enhances the decision making process.
EP06761063.4A 2005-06-21 2006-06-19 Nichtdestruktives testen von rohren Active EP1896842B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/156,573 US7328618B2 (en) 2005-06-21 2005-06-21 Non-destructive testing of pipes
PCT/CA2006/000996 WO2006136013A1 (en) 2005-06-21 2006-06-19 Non-destructive testing of pipes

Publications (3)

Publication Number Publication Date
EP1896842A1 true EP1896842A1 (de) 2008-03-12
EP1896842A4 EP1896842A4 (de) 2011-08-10
EP1896842B1 EP1896842B1 (de) 2017-03-01

Family

ID=37570059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06761063.4A Active EP1896842B1 (de) 2005-06-21 2006-06-19 Nichtdestruktives testen von rohren

Country Status (7)

Country Link
US (2) US7328618B2 (de)
EP (1) EP1896842B1 (de)
JP (3) JP2008544260A (de)
AU (1) AU2006261535B2 (de)
CA (1) CA2612835C (de)
NZ (1) NZ564647A (de)
WO (1) WO2006136013A1 (de)

Families Citing this family (77)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8017858B2 (en) * 2004-12-30 2011-09-13 Steve Mann Acoustic, hyperacoustic, or electrically amplified hydraulophones or multimedia interfaces
US7328618B2 (en) * 2005-06-21 2008-02-12 National Research Council Of Canada Non-destructive testing of pipes
US7810378B2 (en) 2007-06-21 2010-10-12 National Research Council Of Canada Monitoring of leakage in wastewater force mains and other pipes carrying fluid under pressure
CA2718476C (en) * 2008-03-14 2016-11-15 Cidra Corporate Services, Inc. Flow and pipe management using velocity profile measurement and/or pipe wall thickness and wear monitoring
US9182081B2 (en) * 2008-06-30 2015-11-10 Bp Corporation North America Inc. Rapid data-based data adequacy procedure for pipeline integrity assessment
US7941282B2 (en) 2008-08-01 2011-05-10 Bp Exploration Operating Company Limited Estimating worst case corrosion in a pipeline
AU2009279337B2 (en) * 2008-08-05 2014-07-10 Pure Technologies Ltd. Device and method to assess impairment of pipeline wall strength
US9097601B2 (en) 2008-08-15 2015-08-04 Adelaide Research & Innovation Pty Ltd. Method and system for assessment of pipeline condition
GB0914463D0 (en) * 2009-08-19 2009-09-30 Sev Trent Water Ltd Leak detector
US9134277B2 (en) * 2009-11-22 2015-09-15 Acousticeye Ltd Apparatus and method for real time monitoring of tube systems
KR100989515B1 (ko) * 2010-05-03 2010-10-26 부경엔지니어링주식회사 마이크로프로세서를 이용한 관로 파이프 구간의 검사 장치 및 그 방법
CA2766850C (en) 2010-06-16 2020-08-11 Mueller International, Llc Infrastructure monitoring devices, systems, and methods
RU2467299C1 (ru) * 2011-05-12 2012-11-20 Дочернее Открытое Акционерное Общество (ДОАО) "Оргэнергогаз" ОАО "Газпром" Способ гидравлического испытания на удар и реабилитации трубопровода, осуществляемый при его нагружении повышенным давлением в полевых условиях
GB2492802A (en) * 2011-07-13 2013-01-16 Statoil Petroleum As Using distributed acoustic measurements for surveying a hydrocarbon producing well and for compensating other acoustic measurements
US9772250B2 (en) 2011-08-12 2017-09-26 Mueller International, Llc Leak detector and sensor
US11796450B1 (en) 2012-03-05 2023-10-24 Vista Precision Solutions, Inc. Method and apparatus for determining the time between internal inspections of a tank
US10345270B1 (en) 2016-04-18 2019-07-09 Vista Precision Solutions, Inc. Measurement-based, in-service method for determining the time to the next internal inspection of an AST
US9228932B1 (en) 2012-03-05 2016-01-05 Vista Precision Solutions, Inc. Method and apparatus for extending the time between out-of-service, in-tank inspections
US9766175B1 (en) 2012-03-05 2017-09-19 Vista Precision Solutions, Inc. Method and apparatus for in-service measurement of the bottom thickness and corrosion rate of a tank bottom
US10775293B1 (en) 2012-03-05 2020-09-15 Vista Precision Solutions, Inc. Measurement-based, in-service method for updating the internal inspection interval of an AST
US11221291B2 (en) 2012-03-05 2022-01-11 Vista Precision Solutions, Inc. Measurement-based, in-service method for updating the internal inspection interval of an AST
JP5673593B2 (ja) * 2012-04-11 2015-02-18 日本電気株式会社 漏水検知方法および漏水検知装置
US9939344B2 (en) 2012-10-26 2018-04-10 Mueller International, Llc Detecting leaks in a fluid distribution system
EP2725352A1 (de) 2012-10-27 2014-04-30 Valerian Goroshevskiy Gerät zum berührungslosen Prüfen von metallischen Konstruktionen
WO2014148933A1 (en) * 2013-03-18 2014-09-25 Siemens Aktiengesellschaft Method and monitoring device for monitoring a structure
RU2516766C1 (ru) * 2013-04-09 2014-05-20 Открытое Акционерное Общество (ОАО) "Оргэнергогаз" Способ восстановления несущей способности трубопровода
US9651445B2 (en) 2013-04-15 2017-05-16 Ut-Battelle, Llc Fluid pipeline leak detection and location with miniature RF tags
US20160097746A1 (en) * 2013-04-19 2016-04-07 Gutermann Ag Method for evaluating acoustic sensor data in a fluid carrying network and evaluation unit
US9528903B2 (en) 2014-10-01 2016-12-27 Mueller International, Llc Piezoelectric vibration sensor for fluid leak detection
EP3203211B1 (de) * 2014-10-01 2020-06-24 The Chugoku Electric Power Co., Inc. Restlebensdauerschätzungsverfahren zur schätzung der restlichen lebensdauer eines stahlrohrs mit hohem chromgehalt
CN104535654B (zh) * 2015-01-29 2017-06-16 太原工业学院 一种用于检测金属棒的超声无损检测装置
US20160290974A1 (en) * 2015-03-31 2016-10-06 Mueller International, Llc Determination of pipe wall failure based on minimum pipe wall thickness
US9835592B2 (en) 2015-06-16 2017-12-05 Mueller International, Llc Determination of tuberculation in a fluid distribution system
US20200400643A1 (en) * 2015-09-21 2020-12-24 AMI Investments, LLC Remote monitoring of water distribution system
CN105468812A (zh) * 2015-10-26 2016-04-06 中国石油天然气股份有限公司 一种埋地悬空管道可靠度测量方法
GB2558493A (en) * 2015-11-04 2018-07-11 Nec Corp Pipe condition detection device, pipe condition detection method, computer-readable recording medium, and pipe condition detection system
US9670650B2 (en) * 2015-11-09 2017-06-06 Sensus Spectrum Llc Fire hydrant monitoring system
US10067092B2 (en) * 2015-12-18 2018-09-04 Mueller International, Llc Noisemaker for pipe systems
US10283857B2 (en) 2016-02-12 2019-05-07 Mueller International, Llc Nozzle cap multi-band antenna assembly
US10305178B2 (en) 2016-02-12 2019-05-28 Mueller International, Llc Nozzle cap multi-band antenna assembly
US10267774B2 (en) 2016-02-29 2019-04-23 Mueller International, Llc External noisemaker for pipe systems
GB2562976B (en) 2016-03-10 2021-09-15 Nec Corp Diagnostic device, diagnostic system, diagnostic method, and program
RU2620023C1 (ru) * 2016-08-09 2017-05-22 Общество с ограниченной ответственностью "ТЕХНОАС-СК" Способ определения места течи в трубопроводе и устройство для его осуществления
KR101892847B1 (ko) * 2017-02-27 2018-08-29 한국로봇융합연구원 선박 외벽 손상부의 위치 검출 시스템
JP7131887B2 (ja) * 2017-03-15 2022-09-06 日本電気株式会社 分析装置、分析システム、分析方法及びプログラム
EP3605437A4 (de) 2017-03-28 2020-07-08 Nec Corporation Rohrleitungsdiagnosevorrichtung, objektverwaltungsvorrichtung, rohrleitungsdiagnoseverfahren und computerlesbares aufzeichnungsmedium
JP6922973B2 (ja) 2017-03-28 2021-08-18 日本電気株式会社 配管診断装置、資産管理装置、配管診断方法、及びプログラム
US10209225B2 (en) * 2017-04-21 2019-02-19 Mueller International, Llc Sound propagation comparison with automated frequency selection for pipe condition assessment
US10690630B2 (en) * 2017-04-21 2020-06-23 Mueller International, Llc Generation and utilization of pipe-specific sound attenuation
US10565752B2 (en) 2017-04-21 2020-02-18 Mueller International, Llc Graphical mapping of pipe node location selection
KR101794968B1 (ko) * 2017-04-27 2017-11-07 (주)서용엔지니어링 소화전을 이용한 상수도의 누수감지장치
KR101954811B1 (ko) * 2017-07-24 2019-03-06 전남대학교산학협력단 대상체의 손상 두께 예측 시스템 및 방법
US10539480B2 (en) 2017-10-27 2020-01-21 Mueller International, Llc Frequency sub-band leak detection
JP6355095B1 (ja) * 2017-10-30 2018-07-11 株式会社システムアンドデータリサーチ 二点間の波動伝播時間の推定方法
JP6355061B1 (ja) * 2017-11-02 2018-07-11 株式会社システムアンドデータリサーチ 二点間の波動伝播時間の推定方法
US20210181057A1 (en) * 2017-11-08 2021-06-17 Nec Corporation Estimating device, estimating method, and program storing medium
US11103735B2 (en) * 2018-02-12 2021-08-31 Tyco Fire Products Lp Microwave systems and methods for monitoring pipes of a fire protection system
EP3764074A4 (de) 2018-03-09 2021-04-14 NEC Corporation Rohrleitungsdiagnosevorrichtung, anlagenverwaltungsvorrichtung, rohrleitungsdiagnoseverfahren und aufzeichnungsmedium
US11733115B2 (en) * 2018-06-08 2023-08-22 Orbis Intelligent Systems, Inc. Detection devices for determining one or more pipe conditions via at least one acoustic sensor and including connection features to connect with an insert
KR102038689B1 (ko) 2018-06-14 2019-10-30 한국원자력연구원 거리차-주파수 분석을 이용한 배관의 누설 감지장치 및 방법
US10859462B2 (en) 2018-09-04 2020-12-08 Mueller International, Llc Hydrant cap leak detector with oriented sensor
US11342656B2 (en) 2018-12-28 2022-05-24 Mueller International, Llc Nozzle cap encapsulated antenna system
US11313748B2 (en) 2019-01-18 2022-04-26 Mueller International, Llc Pressure monitor housing with cap-engaging projection
US11067464B2 (en) 2019-01-18 2021-07-20 Mueller International, Llc Wet barrel hydrant with pressure monitoring and leak detection
US11473993B2 (en) 2019-05-31 2022-10-18 Mueller International, Llc Hydrant nozzle cap
US10768146B1 (en) 2019-10-21 2020-09-08 Mueller International, Llc Predicting severity of buildup within pipes using evaluation of residual attenuation
BR102019028015A2 (pt) * 2019-12-27 2021-07-06 Cia De Saneamento Basico Do Estado De Sao Paulo Sabesp método e sistema de análise e fornecimento de índice de qualidade para correlacionador de ruídos
WO2021127754A1 (pt) * 2019-12-27 2021-07-01 Companhia De Saneamento Básico Do Estado De São Paulo - Sabesp Método e bancada de simulação de sinais de vazamento em duto
JP6829534B1 (ja) * 2020-03-17 2021-02-10 智大 久保田 非破壊検査装置
US11542690B2 (en) 2020-05-14 2023-01-03 Mueller International, Llc Hydrant nozzle cap adapter
CN111622727B (zh) * 2020-05-18 2022-08-05 中国石油天然气股份有限公司 一种识别暂堵转向压裂有效性的方法
US11726064B2 (en) * 2020-07-22 2023-08-15 Mueller International Llc Acoustic pipe condition assessment using coherent averaging
US11609348B2 (en) * 2020-12-29 2023-03-21 Mueller International, Llc High-resolution acoustic pipe condition assessment using in-bracket pipe excitation
US11578971B2 (en) * 2021-02-12 2023-02-14 Holloway Ndt & Engineering Inc. Ultrasonic testing using a phased array
US11754544B2 (en) 2021-02-26 2023-09-12 Mueller International, Llc Bulk modulus testing apparatus
US20230017820A1 (en) * 2021-07-19 2023-01-19 Mueller International, Llc Acoustic pipeline condition assessment at resolution down to pipe stick
CN116608802A (zh) * 2023-07-17 2023-08-18 中国空气动力研究与发展中心计算空气动力研究所 厚度变化时温度和厚度同步测量方法、装置、设备及介质

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6561032B1 (en) * 2000-05-15 2003-05-13 National Research Council Of Canada Non-destructive measurement of pipe wall thickness

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056970A (en) * 1975-10-30 1977-11-08 Yeda Research And Development Co., Ltd. Ultrasonic velocity and thickness gage
US4930358A (en) * 1987-03-27 1990-06-05 Tokyo Keiki Co., Ltd. Method of and apparatus for measuring flow velocity by using ultrasonic waves
JPH0476454A (ja) * 1990-07-19 1992-03-11 Shimada Phys & Chem Ind Co Ltd 液配管の検査方法
GB2253907B (en) * 1991-03-21 1995-05-24 Halliburton Logging Services Device for sensing fluid behaviour
US5531099A (en) * 1994-11-09 1996-07-02 At&T Corp. Underground conduit defect localization
US5708211A (en) * 1996-05-28 1998-01-13 Ohio University Flow regime determination and flow measurement in multiphase flow pipelines
US5970434A (en) * 1998-01-29 1999-10-19 Southwest Research Institute Method for determining average wall thickness for pipes and tubes using guided waves
US6000288A (en) * 1998-04-21 1999-12-14 Southwest Research Institute Determining average wall thickness and wall-thickness variation of a liquid-carrying pipe
EP1194745B1 (de) * 1999-07-02 2007-09-19 Weatherford/Lamb, Inc. Durchflussmessung unter verwendung von instabilen drücken
US7261002B1 (en) * 1999-07-02 2007-08-28 Cidra Corporation Flow rate measurement for industrial sensing applications using unsteady pressures
JP2001194349A (ja) * 1999-11-04 2001-07-19 Mitsubishi Heavy Ind Ltd 覆工体の背面検査装置及びその背面検査方法
US6453247B1 (en) * 2000-01-14 2002-09-17 National Research Council Of Canada PC multimedia-based leak detection system for water transmission and distribution pipes
JP2002236115A (ja) * 2001-02-06 2002-08-23 Sonoda Engineering:Kk 導管の劣化診断方法およびその装置
JP2003185643A (ja) * 2001-12-17 2003-07-03 Matsushita Electric Ind Co Ltd ひび割れ検知システム
JP3986049B2 (ja) * 2002-01-15 2007-10-03 財団法人くまもとテクノ産業財団 欠陥検査方法および欠陥検査装置
JP3913144B2 (ja) * 2002-08-27 2007-05-09 株式会社日立製作所 配管検査方法及び装置
US7328618B2 (en) * 2005-06-21 2008-02-12 National Research Council Of Canada Non-destructive testing of pipes
US7881884B2 (en) * 2007-02-06 2011-02-01 Weatherford/Lamb, Inc. Flowmeter array processing algorithm with wide dynamic range

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6561032B1 (en) * 2000-05-15 2003-05-13 National Research Council Of Canada Non-destructive measurement of pipe wall thickness

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE COMPENDEX [Online] ENGINEERING INFORMATION, INC., NEW YORK, NY, US; July 1963 (1963-07), HALLIWELL A R: "Velocity of water-hammer wave in elastic pipe", XP009149741, Database accession no. EIX19630045016 *
See also references of WO2006136013A1 *

Also Published As

Publication number Publication date
AU2006261535B2 (en) 2011-11-10
JP2008544260A (ja) 2008-12-04
JP5687262B2 (ja) 2015-03-18
AU2006261535A1 (en) 2006-12-28
EP1896842A4 (de) 2011-08-10
US20080078247A1 (en) 2008-04-03
US7475596B2 (en) 2009-01-13
CA2612835C (en) 2013-08-13
US20060283251A1 (en) 2006-12-21
NZ564647A (en) 2011-07-29
WO2006136013A1 (en) 2006-12-28
JP2015083979A (ja) 2015-04-30
JP2013061350A (ja) 2013-04-04
JP5930427B2 (ja) 2016-06-08
CA2612835A1 (en) 2006-12-28
EP1896842B1 (de) 2017-03-01
US7328618B2 (en) 2008-02-12

Similar Documents

Publication Publication Date Title
US7475596B2 (en) Non-destructive testing of pipes
US6561032B1 (en) Non-destructive measurement of pipe wall thickness
Muggleton et al. Axisymmetric wave propagation in fluid-filled pipes: wavenumber measurements in in vacuo and buried pipes
Wijewickreme et al. Response of buried steel pipelines subjected to relative axial soil movement
WO2010017599A1 (en) Method and system for assessment of pipeline condition
Muggleton et al. A theoretical study of the fundamental torsional wave in buried pipes for pipeline condition assessment and monitoring
Smith et al. Monitoring buried pipe deformation using acoustic emission: quantification of attenuation
Reis et al. Estimation of corrosion damage in steel reinforced mortar using guided waves
Muntakim et al. Interpretation of acoustic field data for leak detection in ductile iron and copper water-distribution pipes
JP2002236115A (ja) 導管の劣化診断方法およびその装置
Scussel et al. Estimation of the bulk and shear moduli of soil surrounding a plastic water pipe using measurements of the predominantly fluid wave in the pipe
Gao et al. Model test study on oil leakage and underground pipelines using ground penetrating radar
Huang et al. Two-dimensional pitted corrosion localization on coated steel based on fiber Bragg grating sensors
Lee et al. Condition Assessment Technologies for water transmission and sewage conveyance systems
Yang et al. Nondestructive evaluation of the depth of surface-breaking cracks in concrete pipes
Klar et al. Leakage-Induced Pipeline Stressing and its Potential Detection by Distributed Fiber Optic Sensing.
Pavić Experimental identification of physical parameters of fluid-filled pipes using acoustical signal processing
Xu et al. A novel measurement method of toe debris thickness for bored piles based on one-dimensional wave theory
Bracken et al. Acoustic methods for determining remaining pipe wall thickness in asbestos cement and ferrous pipes
RU2539603C1 (ru) Способ ранней диагностики магистрального нефтепровода для предотвращения развития процессов его разрушения
Paulson et al. Pipe wall evaluation using acoustic pulses
Poenaru et al. In situ and laboratory soil investiga tions. Correlations between different parameters spe cific to Bucharest area
Zhuo et al. Analysis model to simulate the cracked pipe buried in soil
Sun et al. Ultrasonic Stress Measurement and Finite Element Analysis of Settlement Pipeline
Chowdhury et al. PCCP Profiling and Tube Wave Analysis of WRE Signal

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20080117

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

DAX Request for extension of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
A4 Supplementary search report drawn up and despatched

Effective date: 20110711

RIC1 Information provided on ipc code assigned before grant

Ipc: G01N 29/07 20060101AFI20110705BHEP

Ipc: G06F 17/10 20060101ALI20110705BHEP

Ipc: G01N 29/44 20060101ALI20110705BHEP

Ipc: G01M 3/02 20060101ALI20110705BHEP

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MUELLER INTERNATIONAL, LLC

17Q First examination report despatched

Effective date: 20141215

REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Ref document number: 602006051832

Country of ref document: DE

Free format text: PREVIOUS MAIN CLASS: G01N0029070000

Ipc: G01B0017020000

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIC1 Information provided on ipc code assigned before grant

Ipc: G01N 29/44 20060101ALI20151030BHEP

Ipc: G01N 29/07 20060101ALI20151030BHEP

Ipc: G01B 17/02 20060101AFI20151030BHEP

Ipc: G01N 29/22 20060101ALI20151030BHEP

Ipc: G01M 3/24 20060101ALI20151030BHEP

INTG Intention to grant announced

Effective date: 20151123

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 871892

Country of ref document: AT

Kind code of ref document: T

Effective date: 20170315

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602006051832

Country of ref document: DE

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 12

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20170301

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 871892

Country of ref document: AT

Kind code of ref document: T

Effective date: 20170301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170602

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170601

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170703

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170701

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602006051832

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed

Effective date: 20171204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170630

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170630

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170619

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170619

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20170630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20060619

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 602006051832

Country of ref document: DE

Representative=s name: PAGE, WHITE & FARRER GERMANY LLP, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 602006051832

Country of ref document: DE

Representative=s name: SCHWEIGER, MARTIN, DIPL.-ING. UNIV., DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 602006051832

Country of ref document: DE

Representative=s name: PAGE, WHITE & FARRER GERMANY LLP, DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230530

Year of fee payment: 18

Ref country code: DE

Payment date: 20230523

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20230530

Year of fee payment: 18

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230804

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20230519

Year of fee payment: 18